WO2009059474A1 - Système et procédé de multiplexage multicontexte d'un seul intervalle de temps dans une passerelle multimédia pour transférer de la voix - Google Patents

Système et procédé de multiplexage multicontexte d'un seul intervalle de temps dans une passerelle multimédia pour transférer de la voix Download PDF

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Publication number
WO2009059474A1
WO2009059474A1 PCT/CN2007/003615 CN2007003615W WO2009059474A1 WO 2009059474 A1 WO2009059474 A1 WO 2009059474A1 CN 2007003615 W CN2007003615 W CN 2007003615W WO 2009059474 A1 WO2009059474 A1 WO 2009059474A1
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WO
WIPO (PCT)
Prior art keywords
time slot
multimedia gateway
voice
context
call
Prior art date
Application number
PCT/CN2007/003615
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English (en)
Chinese (zh)
Inventor
Haibo Ma
Zichun Zhou
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2009059474A1 publication Critical patent/WO2009059474A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers

Definitions

  • the present invention relates to the field of mobile communications, and more particularly to a system and method for multiplexing multiple independent voices in a single time slot in multiple contexts on an MGW (Multimedia Gateway).
  • MGW Multimedia Gateway
  • MGC Media Gateway Controller
  • MGW Media Gateway, Media Gateway
  • H.248, defined by ITU-T gateway control
  • the MGW provides an external TDM interface to implement interworking between the softswitch network and the BSC (Base Station Controller), PSTN (Public Switched Telephone Network) and other networks.
  • BSC Base Station Controller
  • PSTN Public Switched Telephone Network
  • the basic unit for providing a voice channel on the MGW is a time slot, and the minimum granularity of the TDM terminal defined in the H.248 protocol is also a time slot.
  • the compressed multi-channel bandwidth voice can be multiplexed into one time slot, such as four 16 Kbit/s voices or eight 8 Kbit/s voices.
  • the cost of laying TDM transmission lines is usually high.
  • the utilization efficiency of TDM resources can be improved and the cost can be greatly reduced.
  • the work of multiplexing and demultiplexing multiple voices in a single time slot is performed by an independent device, and the networking mode is as shown in FIG.
  • the MGW directly communicates with the BSC or the PSTN network element, if the multiplexing and demultiplexing of multiple voices in a single time slot can be completed in the MGW, the independent transmission multiplexing device can be saved, and the network can be saved.
  • each voice signal has a single time slot.
  • multiplexing terminals and multiplexing descriptors are defined, which can be used for multiplexing and demultiplexing operations of voice, video, and data streams in one time slot.
  • the existing processes and methods are only for multiplexing and demultiplexing multiple different types of media streams in one time slot, and more importantly, only for a single multimedia call within the same context.
  • multiple independent voice calls they should be handled in different contexts.
  • the granularity of BIT should also be used for representation.
  • there is currently no such representation in the H.248 protocol and there is also a lack of a description of the process of multiplexing multiple independent voice calls on a single time slot.
  • the present invention proposes to embed the function of multiplexing multiple voices in a single time slot on the MGW, and gives a method for the MGC to control the MGW to complete the multiplexing and demultiplexing function. Therefore, there is a need for a multi-context multiplexing single-slot voice delivery solution on a multimedia gateway that solves the problems in the related art described above.
  • a system for multi-context multiplexing single-slot voice transmission on a multimedia gateway includes: a multiplexing demultiplexing processing unit, disposed in the multimedia gateway, It is used to extract voice signals carried by different bits on one slot and to interact with the multimedia gateway.
  • the multimedia gateway is configured to parse a call setup message from the multimedia gateway controller to create a context, and after assigning the identity of the calling terminal to one or more bits on the time slot of the voice signal,
  • the demultiplexing processing unit is used, and the voice signal extracted by the multiplexing demultiplexing processing unit is switched to the called terminal in the context to establish a voice call between the calling terminal and the called terminal.
  • the contexts created during the establishment of a multi-channel voice call by the multimedia gateway are independent of each other, and each context maintains its own topology.
  • the call setup message is an H.248 command message.
  • Step S302 A media gateway controller sends a call to a multimedia gateway.
  • Step S304 after receiving the call setup message, the multimedia gateway parses the call setup message to create a context, and Extracting, by the demultiplexing processing unit, a voice signal carried by one or more bits in the time slot to establish a voice call within the media gateway; and step S306, if the multimedia gateway utilizes another unoccupied one of the time slots When the plurality of bits carry another voice signal, step S302 and step S304 are repeated to implement the multi-context multiplexing time slot to transmit the voice signal.
  • Step S304 includes the following steps: after receiving the setup call message, the multimedia gateway parses the call setup message to create a context, and assigns an identifier of the calling terminal to one or more bits in the time slot; and multiplexing demultiplexing
  • the processing unit extracts the voice signal carried by one or more bits in the time slot and switches the voice signal to the called terminal in the context to establish a voice call between the calling terminal and the called terminal.
  • the method further includes the step of: if the multimedia gateway controller specifies to use the one or more bits of the time slot to establish another voice call, if the specified one or more bits are the same as the bit specified by the previous voice call There is overlap, and the multimedia gateway returns a call setup failure message.
  • the multimedia gateway controller uses the bit representation packet to specify one time slot for the 7
  • the method for transmitting voice in a multi-context multiplexing single-slot on the MGW according to the present invention is to implement the multiplexing and demultiplexing function of the single-slot transmission multi-channel voice on the MGW, and create multiple contexts to exchange the slaves. Multiple voice signals extracted from different BIT bits in a single time slot share a channel of a multiplexing demultiplexing processing device, and a multi-channel voice call is simultaneously established by using one time slot on the MGW.
  • the invention realizes that the multiplex demultiplexing function is built in the MGW to realize that the independent multiplexing demultiplexing device is not set in the network, and the TDM transmission from the BSC/PSTN in which multiple voices are multiplexed in a single time slot is adopted.
  • the line is directly introduced into the MGW and terminated on the MGW, and the multiplexing and demultiplexing processing is completed inside the MGW. This improves the utilization efficiency of the TDM transmission line and reduces the networking.
  • FIG. 1 is a schematic diagram showing a conventional multiplexing demultiplexing device independent of an MGW networking
  • FIG. 2 is a diagram showing a system for multi-context multiplexing single-slot transmission of voice on a multimedia gateway according to the present invention
  • 3 is a flow chart showing a method for multi-context multiplexing single-slot transfer of voice on a multimedia gateway according to the present invention
  • FIG. 4 is a diagram showing multi-context multiplexing single time on a multimedia gateway according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing a frame structure for transmitting a plurality of voices using a single time slot according to another embodiment of the present invention
  • FIG. 6 is a diagram showing an MGC control according to another embodiment of the present invention. Schematic diagram of a flow of multi-context multiplexing single-slot transmission of multiple voices by the MGW; and FIG.
  • FIG. 7 is a diagram illustrating different BIT bits carried by processing single slots in multiple contexts within the MGW according to another embodiment of the present invention Schematic diagram of the speech signal.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
  • 2 is a block diagram showing a system for multi-context multiplexing single-slot transfer of voice over a multimedia gateway in accordance with the present invention.
  • a system 200 for multi-context multiplexing single-slot voice transmission on a multimedia gateway according to the present invention includes a multimedia gateway 202, and the system further includes: multiplexing demultiplexing processing
  • the unit 204 is disposed in the multimedia gateway, and is configured to extract a voice signal carried by different bits on a time slot, and interact with the multimedia gateway 202.
  • the multimedia gateway 202 is configured to parse a call setup message from the multimedia gateway controller to create a context, and associate the time slot to the one after assigning the identity of the calling terminal to one or more bits on the time slot carrying the voice signal.
  • the demultiplexing processing unit 204 is used, and the voice signal tuned by the multiplexing demultiplexing processing unit 204 is switched to the called terminal in the context to establish a voice call between the calling terminal and the called terminal.
  • the call setup message is an H.248 command message.
  • Step S302 When the media gateway controller sends a call setup message to the multimedia gateway, the voice signal is specified for the voice signal.
  • Step S304 after receiving the call setup message, the multimedia gateway parses the call setup message to create a context, and the multiplexing demultiplexing processing unit extracts the time slot a voice signal carried by one or more of the bits to establish a voice call within the media gateway; and step S306, if the multimedia gateway utilizes another unoccupied one or more bits of the time slot to carry another voice signal At time, step S302 and step S304 are repeated to implement the multi-context multiplexing time slot to transmit the voice signal.
  • Step S304 includes the following steps: after receiving the setup call message, the multimedia gateway parses the call setup message to create a context, and assigns an identifier of the calling terminal to one or more bits in the time slot; and multiplexing demultiplexing
  • the processing unit extracts the voice signal carried by one or more bits in the time slot and switches the voice signal to the called terminal in the context to establish a voice call between the calling terminal and the called terminal.
  • the method further includes the step of: if the multimedia gateway controller specifies to use the one or more bits of the time slot to establish another voice call, if the specified one or more bits are the same as the bit specified by the previous voice call There is overlap, and the multimedia gateway returns a call setup failure message.
  • the multimedia gateway controller uses the bit representation packet to specify one time slot for carrying the voice signal and one or more bits in the time slot in the attributes of the calling terminal and the called terminal.
  • the call setup message is an H.248 command message.
  • the contexts created during the establishment of a multi-channel voice call by the multimedia gateway are independent of each other, and each context maintains its own topology.
  • 4 is a flow chart showing a method of multi-context multiplexing single-slot transfer of voice on a multimedia gateway in accordance with an embodiment of the present invention.
  • a method for multi-context multiplexing single-slot voice transmission on a multimedia gateway includes the following steps: Step bare S402, a device for multiplexing multiple independent voices in a single time slot is built into Implemented on the MGW instead of using a separate device to do this.
  • These newly added hardware and software are superimposed on the existing processing architecture of the MGW, and have no effect on the existing functions of the MGW; S404, defining a BIT bit representation packet in a single time slot, for indicating between the MGC and the MGW, which one or more BIT bits in a single time slot need to occupy a voice call, so that the H.248 protocol can be compared
  • the smaller time slot size represents the TDM terminal.
  • One time slot includes 8 BITs, and the BIT in one time slot can be divided into 1 to 8 voice channels by using the BIT bit representation packet;
  • Step S406 when the MGC needs to establish a multiplexed one channel in the single time slot on the MGW In a separate voice call, first specify a certain number of trunk lines and a specific time slot therein, and then use the BIT bit representation packet in the terminal attribute to specify which of the time slots or which BIT bits are used to carry the call.
  • Voice after the MGW parses the command for establishing a voice channel issued by the MGC and clarifies the required relay, time slot and BIT bit, the processing program on the MGW first creates a new context, and then the time slot is provided.
  • the processing device of the multiplexing demultiplexing function is connected, and the voice signal carried on the corresponding BIT bit is extracted from a single time slot, and the voice signal is exchanged to another terminal in the same context by the internal switching capability of the MG W.
  • this achieves the establishment of a voice call in the MGW (a basic call generally corresponds to a context, contains two terminals, respectively representing the main called, need The two terminals are physically connected or exchanged within the MGW to implement communication between the calling and the called parties.
  • Step naked S410 after the fourth step, if the MGC needs to continue to occupy the same trunk in the same time slot. The remaining one or several BIT bits for another call, the MGW needs to create a new context, which is completely independent of the context created in the fourth step, two on the
  • topology refers to the connection or exchange relationship between terminals in a context
  • Step S412 using multiple voice signals carried by different BIT bits on the same time slot, an identical need to be used
  • the channels of the demultiplexing processing device are multiplexed to complete the extraction of the respective speech signals, which are connected or switched to other terminals in their respective contexts through different ports on the processing device channel.
  • FIG. 5 is a schematic diagram of a frame structure for multiplexing multiple voices in a single time slot. As shown in the figure, a time slot includes 8 BIT bits.
  • the 8 BIT bits can be divided into 4 groups, 3 groups, and 8 groups to form a number of low-rate voice transmission channels (for example, when divided into 4 groups).
  • Channel 16Kbit/s bandwidth), the division of BIT bits and the number of channels in a single time slot can be arbitrary (of course, no more than 8 groups).
  • 6 is a schematic diagram showing a flow of an MGC controlling an MGW to perform multi-context multiplexing single-slot transfer of multiplexed voice according to the embodiment. As shown in FIG. 6, the process includes the following steps: Step S602: When the MGC requests the MGW to establish a new call, it specifies a certain time slot and a BIT bit thereof, such as BIT0/BIT1 in TS1 (TimeSlot).
  • Steps S604 ⁇ S608 after receiving the command, the MGW parses the H.248 command message, creates a new context C1, and assigns a terminal identifier T1 to BIT0/BIT1 of TS1, and then associates it with the multiplexing solution.
  • the multiplexing processing device extracts the voice signal carried on the BIT0/BIT1 of the TS 1; then the MGW returns a response to the MGC successfully processing the command; for a basic call, there are usually two parameters, so] VIGC will The command adds another force to the terminal ⁇ 2 in the context C1; after the MGW succeeds, the response of the successful processing is also given; finally, the voice stream exchange between T1 and ⁇ 2 is completed inside the MGW, and the user starts the call.
  • Terminals T1 and ⁇ 2 can be understood as representing the primary called party in a call, respectively.
  • FIG. 2 is a diagram showing a voice signal carried by processing different BIT bits of a single slot in a plurality of contexts within the MGW according to the embodiment.
  • the multiplex demultiplexing device inside the MGW extracts voice signals from different BITs of the time slot TS1, and completes voice stream exchange between the calling and called users within one context.
  • the contexts C1 and C2 can be understood as representing different voice calls, respectively.
  • the invention realizes that the multiplex demultiplexing function is built in the MGW to realize that the independent multiplexing demultiplexing device is not set in the network, and the TDM transmission from the BSC/PSTN in which multiple voices are multiplexed in a single time slot is adopted.
  • the line is directly introduced into the MGW and terminated on the MGW, and the multiplexing and demultiplexing processing is completed inside the MGW. This way, the utilization efficiency of the TDM transmission line is improved, and the networking is simplified.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention porte sur un système et un procédé pour un multiplexage multicontexte d'un seul intervalle de temps dans une passerelle multimédia pour transférer des signaux vocaux, le procédé comprenant les étapes suivantes : une étape S302 consistant à désigner un intervalle de temps et un ou plusieurs bits dans l'intervalle de temps utilisés pour transporter le signal vocal lorsque le contrôleur de passerelle multimédia envoie le message de création d'appel à la passerelle multimédia ; une étape S304 à laquelle la passerelle multimédia analyse le message de création d'appel afin de créer le contexte après réception du message de création d'appel et l'unité de traitement de multiplexage/démultiplexage extrait le signal vocal transporté par le ou les bits dans l'intervalle de temps afin de créer un appel vocal dans la passerelle multimédia ; une étape S306 consistant à répéter l'étape S302 et l'étape S304 pour mettre en œuvre le fait que de multiples contextes multiplexent un intervalle de temps pour transférer des signaux vocaux si la passerelle multimédia utilise un ou plusieurs autres bits de l'intervalle de temps qui ne sont pas occupés pour transporter le signal vocal d'une autre route.
PCT/CN2007/003615 2007-11-05 2007-12-14 Système et procédé de multiplexage multicontexte d'un seul intervalle de temps dans une passerelle multimédia pour transférer de la voix WO2009059474A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200710165176 CN101431830B (zh) 2007-11-05 2007-11-05 多媒体网关上多上下文复用单时隙传递语音的系统及方法
CN200710165176.2 2007-11-05

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Cited By (1)

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